Cytological investigations in some important tree species of Rajasthan II. Male meiosis studies in the genus Anogeissus (DC.) Guill., Perr. and A. Rich.

摘要

Male meiosis studies were under taken in seven different accessions belonging to three species of Anogeissus, an important hard wood tree of and and semiarid regions of western India. Data collected on chromosome associations, chiasma analysis and distribution pattern of chromosomes at anaphase I/II confirmed that the genus Anogeissus is monobasic in origin (n=12) and its speciation is mostly helped by genetic/genic alternations, B-chromosomes, and distally localized recombinations followed by extensive out breeding. Virtually polyploidy and structural changes of chromosomes (interchanges, inversions etc.) played no role in its evolution. [References: 26]